Intraluminal lining

ABSTRACT

The present invention is directed to a prosthesis for implantation within a body lumen. The prosthesis includes a biocompatible elongate intraluminal liner in the form of a graft, with a biocompatible adhesive being disposed on an exterior surface of the graft. The adhesive is active in an intraluminal environment so as to bond the exterior surface of the graft to an intraluminal surface of said body lumen, such as the interior of a blood vessel.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation of U.S. application Ser. No.10/342,914, filed on Jan. 15, 2003, which is a continuation of U.S.application Ser. No. 09/957,618, filed Sep. 20, 2001, now U.S. Pat. No.6,514,283, issued Feb. 4, 2003; which is a continuation of U.S.application Ser. No. 09/283,556, filed Apr. 1, 1999, now U.S. Pat. No.6,312,457, issued Nov. 6, 2001, the contents of all of which areincorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to the field of intraluminal prostheses.More specifically, the present invention is directed to an intraluminalprosthesis which is adhesively bonded to the interior wall of a bodyconduit.

BACKGROUND OF THE INVENTION

The use of tubular devices or conduits is well known in the repair orreplacement of damaged or diseased lumens within the body. For example,tubular conduits are used to repair lumens such as in the esophagus andcolon areas, and in particular, prostheses are used in the vascularsystem to repair, buttress or replace a weakened section of the vessel.It is well known in the field of vascular surgery to surgically replacea portion of a vessel with an endoprosthesis, such as a vascular graft.Such replacement procedures, however, generally involve invasivesurgery, resulting in extensive recovery and high risk of infectionand/or rejection.

More recently, the general trend in vascular surgery has moved towardless invasive techniques for repair of vessels. In order to minimize therecovery period and reduce the risk of infection and/or rejection,procedures have been developed for delivery and implantation ofendoprostheses using minimally invasive procedures. Commonly, suchprocedures include intraluminal delivery involving percutaneousinsertion of an endoprosthesis by way of a delivery catheter. Suchendoprostheses include grafts which are generally in the form of atubular lining provided for delivery within a section of a body conduitto treat the complications of atherosclerosis, i.e. arterial occlusionor aneurysms. These less invasive procedures permit delivery andimplementation of an endoprosthesis without the need for replacement ofa portion of the vessel, and thus eliminate major surgical interventionand the risks associated therewith. In order to secure a graft in placeafter delivery, it is common practice to employ a variety of mechanicalsecurement means, for example sutures, staples and the like.Additionally, it is well known to employ a stent in combination with agraft in order to support and secure the graft in place within the bodypassageway after implantation. Stents are typically radially expandableand/or contractible support members which are positioned within a graftmember or other tubular prosthesis. In common usage, after a prosthesishas been properly positioned, the stent is expanded to anchor theprosthesis within the body passageway. Natural cell growth through thewall of the prosthesis can then further anchor the prosthesis in placewithin the body lumen.

As can be appreciated, such mechanical securement means cannoteffectively secure an endoprosthesis such as a graft continuously alongthe entire length thereof. Such mechanical securement can result inunsecured portions of the graft, thus resulting in gaps between thegraft wall and the intraluminal wall of the vessel. Such gaps can resultin an increased amount of cell growth necessary to anchor the prosthesisin place. Further, such mechanical securement can result in a bulkystructure present within the lumen, which can inhibit normal flowthrough the lumen, and create a site for occlusion within the vessel.

Moreover, in recent years, polytetrafluoroethylene (PTFE) has becomeincreasingly popular for use in such vascular graft applications due toits non-stick and inert properties. As can be appreciated, however, PTFEis difficult to adhere to vessel walls due to these inert properties.

Accordingly, a need exists for an implantable prosthesis which can beeasily delivered to a repair site within a vessel, and can beeffectively secured to the internal wall surface of the vessel along thelength of the prosthesis to limit the gap between the prosthesis and thevessel wall.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide an implantableprosthesis capable of effective securement within a body lumen.

It is a further object of the present invention to provide animplantable prosthesis which does not inhibit normal flow through thelumen.

These and other objects are attained through the present inventioninvolving a prosthesis for implantation within a body lumen. Theprosthesis includes a biocompatible elongate intraluminal liner havingan interior surface and an exterior surface. A biocompatible adhesive isdisposed on the exterior surface of the liner. The adhesive is active inan intraluminal environment so as to bond the exterior surface of theliner to an intraluminal surface of the body lumen.

The adhesive may be any type of adhesive known in the art which iscapable of bonding in an intraluminal environment. Preferably, theadhesive is bioabsorbable, and may be a curable polymer adhesive such asphotodynamically cured adhesives including ultraviolet light,temperature curing adhesives, or may be pressure sensitive adhesive.Particularly preferred adhesives include those selected from the groupconsisting of polyurethanes, cyanoacrylates, silicones, (meth)acrylates,and combinations thereof. The adhesive may also be a biological sealantcapable of bonding the liner to the intraluminal surface, includingbiological sealants selected from the group consisting of fibrin,collagen, poly(L-glutamic acid), gelatin based hydrogel, N-vinylpyrrolidone, and mixtures a combinations thereof.

In an alternate embodiment of the present invention, the adhesive isheld within frangible encapsulants or nodules which are disposed on theexterior surface of the tubular body. The encapsulants are capable ofrupturing when compressed between the tubular body and the lumen so asto release the adhesive, thereby bonding the exterior surface of thesaid liner to an intraluminal surface of the body lumen.

The liner preferably includes a plurality of pores sufficient to permitthe ingrowth of body tissue. The adhesive may be disposed through atleast one of these pores in the liner. Further, a mechanical supportsuch as a radially expandable stent may be disposed along the interiorsurface of the tubular body to maintain the tubular body in an openposition. The mechanical support may be removable from the tubular body,and may be bioabsorbable. The mechanical support may be any type ofsupport known, such as porous polymeric band or a helically wound wire.Preferably, the mechanical support is positioned within at least onelongitudinal end of the tubular body, most preferably at an upstream endof the tubular body, and may be provided at both longitudinal ends ofthe tubular body. The adhesive may extend through the pores of the linerand bond the mechanical support to the liner.

The liner may be in the form of a woven, knitted or braided textiletubular body, a spun filament tubular body, an extruded tube, or may beformed from a polymeric sheet. Preferably, the tubular body is formedfrom a material selected from the group consisting of polyesters,polypropylenes, polyethylenes, polyurethanes, polytetrafluoroethylenes,poly-alpha-hydroxy-acids, and combinations thereof. The liner may be abioabsorbable material, but is more preferentially a biologically inertmaterial, such as polytetrafluoroethylene (PTFE). The liner mayexpandable from an insertion diameter to an implantation diameter whichis greater than the insertion diameter so that at the implantationdiameter the liner is conformable to the intraluminal surface of thebody lumen.

In alternate embodiments, the prosthesis further includes a removablecover over the adhesive for delivery, and may include a concentrictubular body within the liner. In such embodiments, the mechanicalsupport is preferably positioned between the concentric tubular body andthe liner.

In a further embodiment of the present invention, a method of adheringan intraluminal liner to a venal wall is provided. The method includesproviding a prosthesis including an intraluminal liner having abiocompatible adhesive active in an intraluminal environment disposed onan exterior surface thereof; delivering the prosthesis to an area ofimplantation; and expanding the prosthesis so as to cause the adhesiveto contact an interior surface of the venal wall, thereby causing theadhesive to bond the prosthesis to the venal wall.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts a perspective view of a prosthesis according to thepresent invention.

FIG. 2 depicts a cross-sectional view of a prosthesis according to thepresent invention.

FIGS. 3 a, 3 b and 3 c depict cross-sectional views of variousembodiments of a prosthesis of the present invention further including amechanical support member.

FIG. 4 depicts a perspective view of a prosthesis according to analternate embodiment of the present invention.

FIGS. 5 a and 5 b depict enlarged views of the embodiment shown in FIG.4.

FIG. 6 depicts yet a further embodiment of the present inventionincluding a lumen conduit liner.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention is directed to a prosthesis for implantationwithin a body lumen. The prosthesis includes a biocompatible elongateintraluminal liner in the form of a graft, with a biocompatible adhesivebeing disposed on an exterior surface of the graft. The adhesive isactive in an intraluminal environment so as to bond the exterior surfaceof the graft to an intraluminal surface of the body lumen, such as theinterior of a blood vessel. Typically, implantable prostheses such asvascular grafts are held in place within a body lumen by suturing or byanchoring with a mechanical device such as a stent. With the presentinvention, prostheses can be properly anchored in place within a bodylumen and maintain the vessel from occluding without the need for suchsuturing or mechanical supports, thus reducing the possibility ofthrombus formation and neo-intimal hyperplasia.

With reference to the drawings, FIG. 1 depicts a prosthesis according tothe present invention. Prosthesis 10 includes intraluminal liner 20 andbiocompatible adhesive 40. Intraluminal liner 20 is defined by anelongate tubular body 21, including internal surface 23 and externalsurface 24.

Intraluminal liner 20 is preferably in the form of a graft, such as avascular graft for repair and/or replacement of damaged or diseasedblood vessels. As such, intraluminal liner 20 is constructed of anymaterial and in any manner known in the art. For example, intraluminalliner 20 may be constructed of an elastomeric material, a bioabsorbablematerial, a shape-memory material, and the like. Intraluminal liner 20may be constructed of spun fibers or filaments such as electrostaticallyspun filaments, or may be constructed of a textile material, such as awoven, knitted and/or braided textile material commonly used asimplantable tubular prostheses. Such a textile prosthesis is preferablyconstructed of yarns or fibers which are interlaced to form a textiletubular fabric. The yams or fibers can be selected from any knownbiocompatible material, for example, synthetic materials such asthermoplastic polymers including polyesters, polypropylenes,polyethylenes, polyurethanes, polytetrafluoroethylenes, and mixturesthereof. The yams of the textile material of tubular body 21 may be ofthe monofilament, multifilament, or spun type, and may be flat, twistedor textured, and may have high, low or moderate shrinkage properties.Additionally, the yarn type and yarn denier can be selected to meetspecific properties for the prosthesis, such as porosity, flexibilityand compliance.

Tubular body 21 of intraluminal liner 20 may also be constructed from abioabsorbable material, for example as a shaped or molded tubular body21, or as a textile or spun tubular body. A non-limiting list ofsuitable absorbable materials includes poly-caprolactone (PCL) andpoly-alpha-hydroxy-acids, such as poly-L-lactide (PLLA), poly-D-lactide(PDLA) and poly-glycolide (PGA), or mixtures thereof.

Tubular body 21 of intraluminal liner 20 may also be constructed of apolymeric material, such as a thermoplastic polymer. For example,tubular body 21 of intraluminal liner 20 may be a molded tubularstructure, an extruded polymer tube, or may be a polymeric sheet wrappedand formed into a tubular configuration. Examples of suitable materialsare thermoplastic polymers including polyesters, polypropylenes,polyethylenes, polyurethanes, polytetrafluoroethylenes, and mixturesthereof. Any known processing of the thus constructed tubular body 21may further be undertaken to impart specific characteristics to tubularbody 21, such as expanding, stretching, orienting, heat setting orconditioning, and the like. Desirably, tubular body 21 is an extrudedpolytetrafluoroethylene (PTFE) tube which has been expanded and heatset. Such a PTFE tube may be balloon expanded prior to attachment to theballoon, may be balloon expanded in vivo, or may be stent expanded by aninternal stent in vivo.

Preferably, intraluminal liner 20 is porous or microporous, mostpreferably such that tubular body 21 includes pores extending throughoutthe tubular structure, such as from internal surface 23 to externalsurface 24. Such pores permit ingrowth of cells therethrough to assistin anchoring prosthesis 10 within a body lumen after implantation. Inembodiments including tubular body 21 as a textile material, suchporosity is achieved through the interlaced yarns or fibers which formtubular body 21 of intraluminal liner 20. In embodiments includingtubular body 21 as a polymeric structure such as a molded tube, anextruded tube or polymeric sheet material, such porosity may be achievedin any known manner, for example by expanding polytetrafluoroethylene toachieve a microporous node and fibril structure, or by including aleachable substance within the polymeric material during construction ofthe tube, and then leaching the substance from the tube to form a porousstructure.

As seen in FIGS. 1 and 2, intraluminal liner 20 includes a biocompatibleadhesive 40 disposed on exterior surface 24 of tubular body 21 thereof.Adhesive 40 may be any adhesive active in an intraluminal environmentand capable of adhering intraluminal liner 20 to the intraluminalsurface of a body lumen, such as a blood vessel. Adhesive 40 is capableof exhibiting adhesive properties in an intraluminal environment so asto bond exterior surface 24 of tubular body 21 to the intraluminalsurface of the body lumen. Adhesive 40 may be any composition known foruse in connection within the mammalian body. Adhesive 40 may be anadhesive in which adhesive properties activate when positioned within anintraluminal environment, such as when placed in contact with blood.Adhesive 40 may be a pressure sensitive adhesive, wherein the adhesiveis activated upon application of pressure of tubular body 21 against anintraluminal surface. Adhesive 40 may also be a curable polymer adhesivefor use in the body, such as a photodynamically curing adhesiveincluding ultraviolet light curing adhesives, or a temperature curingadhesive such as heat curing adhesives. In preferred embodiments,adhesive 40 is bioabsorbable, such that adhesive 40 is present duringimplantation of the prosthesis, and is gradually absorbed into the bodyover time after the prosthesis has been anchored to the vessel throughtissue ingrowth.

Non-limiting examples of suitable adhesives for use in the presentinvention include polyurethanes, cyanoacrylates, (meth)acrylates,silicones, and combinations and mixtures thereof.

Adhesive 40 may also be a biological sealant, or bio-sealant. Biologicalsealants refer to tissue adhesives or biological glues. Non-limitingexamples of suitable biological sealants include fibrin, collagen,fibrin-collagen combinations, poly(1-glumatic acid), hydrogels such asgelatin based hydrogel, N-vinyl pyrrolidone, and mixtures andcombinations thereof.

Adhesive 40 may be provided on the exterior surface 24 of tubular body21 by any known method, for example by spray coating, dip coating,transfer from a tape, and the like. Adhesive 40 may be provided bothlongitudinally along the length and circumferentially about tubular body21. The amount of adhesive 40 disposed on exterior surface 24 of tubularbody 21 may vary depending on the characteristics of the adhesive aswell as the area of implantation. Adhesive 40 may be disposed onexterior surface 24 of tubular body 21 in a continuous thickness overthe entire length thereof, as depicted in the cross-sectional view shownin FIG. 2. Alternatively, adhesive 40 may be provided in varyingthicknesses along the length of tubular body 21. In preferredembodiments incorporating a porous tubular body 21, adhesive 40 coversthe entire exterior surface 24 of tubular body 21 when prosthesis 10 isin a reduced, implantable diameter, and is provided over a percentage ofthe outer surface of tubular body 21 after expansion of prosthesis 10 atthe site of implantation, such that tubular body 21 remains porous afterimplantation to permit sufficient tissue ingrowth.

In an alternate embodiment of the present invention, adhesive 40 may beheld within frangible encapsulants such as nodules 50 depicted in FIG.4. Nodules 50, as shown in an enlarged view in FIG. 5 a, are disposed onexterior surface 24 of tubular body 21, and are capable of rupturingwhen compressed between tubular body 21 and the intraluminal surfacewithin the body lumen. Upon rupturing of nodules 50, adhesive 40 isreleased therefrom, thus bonding intraluminal liner 20 to theintraluminal surface of the body lumen. Nodules 55 are provided onexternal surface 24 of tubular body 21 in any pattern capable ofproviding an effective amount of adhesive 40 over the surface ofintraluminal lining 20 for bonding with the intraluminal surface of thebody lumen upon rupturing of nodules 50. Preferably, nodules 55 arepresent in a consistent, spaced-apart pattern extending about externalsurface 24 of tubular body 21, as depicted in FIG. 4.

Nodules 50 are preferably formed on tubular body 21 by suspending theadhesive in a solvent solution, which can then be applied to the surfaceof the material, for example by spray coating techniques. Nodules 50 mayfurther contain an additional material or composition. For example, inaddition to adhesive 40, nodule 50 may contain an antithrombus material;an anticoagulant such as heparin; an anti-inflammatory composition suchas dexamethasone, doxorubicin or the like; an enzyme inhibitor such asurokinase or streptokinase or the like; growth factors such as vascularendothelial growth factor (VEGF) or the like, or any other active oradditional material.

Nodules 50 may further include rupture lines 55 in the surface ofnodules 50, as depicted in FIG. 5 b. Rupture lines 55 are provided as aseries of perforations or tear lines in the surface of nodule 50,thereby providing for a consistent and predetermined rupture pattern ofnodules 50.

As indicated above, intraluminal liner 20 is preferably a porousstructure, including pores 25 extending through the wall of tubular body21, as seen in FIG. 1. Such porous structures are well known in the art.For example, it is well known to provide vascular grafts with porouswalls for permitting tissue ingrowth through the body of a graft, whichassists in anchoring the graft in place within the body. In preferredembodiments, intraluminal liner 20 is constructed of expandedpolytetrafluoroethylene (ePTFE) which has been extruded or wrapped intoa tubular configuration. Such an ePTFE structure typically includesnodes extending between interconnected fibrils, wherein the nodes form amicroporous structure, for example, for permitting such tissue ingrowth.

In particularly preferred embodiments, intraluminal liner 20 includespores 25 extending through tubular body 21, and adhesive 40 is disposedwithin such pores 25. In this manner, adhesive 40 provides for furthersupport in adhering intraluminal liner 20 within the body lumen. Such anembodiment is particularly useful when intraluminal liner is constructedof polytetrafluoroethylene. For example, chemical bonding of PTFE istypically difficult with adhesives, due to the inert characteristics ofPTFE. By providing a porous or microporous structure with adhesive 40disposed within pores 25, intraluminal lining 20 can be effectivelyanchored through a mechanical attachment as well as a chemicalattachment, due to the additional surface area and forces provided fromadhesive 40 extending through pores 25. In such embodiments, adhesive 40may be present in an amount to fill all of the pores within tubular body21 of intraluminal liner 20, or may be present to partially orcompletely fill only a portion of the pores within tubular body 21 ofintraluminal liner 20.

Additionally, prosthesis 10 may include a mechanical support disposedwithin interior surface 23 of tubular body 21, for further maintainingintraluminal liner 20 in an open position during and after implantation.Such mechanical support is preferably in the form of a stent 60, asdepicted in FIGS. 3 a, 3 b and 3c. Stent 60 may be any type of stentknown in the art. Stent 60 is a bio-compatible material, and may beconstructed of any material known in the art. For example, stent 60 maybe constructed of metal, for example, stainless steel, platinum, gold,nitinol, tantalum, Elgiloy®, and mixtures and alloys thereof. Stent 60may alternatively be constructed of a polymeric material, such as athermoplastic material, or of a shape memory material, such as nitinol,as is known in the art. Further, the stent 60 itself may be a porousmaterial to permit tissue ingrowth, as discussed above with respect tointraluminal liner 20. Stent 60 may be removable from prosthesis 10after implantation, or may be a bioabsorbable material which isgradually absorbed by the body over time, thus leaving intraluminalliner 20 implanted within the body lumen. Alternatively, stent 60 mayindefinitely remain positioned within intraluminal liner afterimplantation of prosthesis 10.

Stent 60 may be constructed in any known shape or form, such as a wirewhich is wound, for example, in a helical winding to create a tubularstructure. Stent 60 may also be constructed of a sheet of material whichis wrapped into a tubular structure. Stent 60 may also be constructed ofa consistent tube of material, such as tubular band 62, as depicted inFIG. 3 c. The mechanical support may include a single stent 60 extendingalong the entire internal surface or only a portion of internal surfaceof tubular body 21 of prosthesis 10, such as at one longitudinal end ofprosthesis 10. Alternatively, the mechanical support may includemultiple stents 60 positioned within the internal surface of tubularbody 21 of prosthesis 10, such as two stents 60 positioned at bothlongitudinal ends of prosthesis 10, as shown in FIGS. 3 b and 3 c.

In preferred embodiments, stent 60 is radially expandable, such as aself-expandable or a balloon-expandable stent. Such radially expandablestents are well known in the art, and are particular useful inpercutaneous delivery applications where the stent can be delivered tothe area of implantation at a reduced diameter, and then expanded tomaintain and support a vessel once the prosthesis is at the area ofimplantation. In preferred embodiments incorporating nodules 50 forcontaining adhesive 40 as discussed above, prosthesis 10 preferablyincludes stent 60 as a balloon expandable stent, as will be discussed inmore detail herein with respect to use of prosthesis 10.

In particularly preferred embodiments, adhesive 40 extends through pores25 of tubular body 21 of intraluminal liner 20 and bonds stent 60 tointraluminal liner 20, thereby creating an integral composite structure.Such an embodiment is particularly preferred when intraluminal liner 20is constructed of polytetrafluoroethylene, as discussed above. As such,adhesive 40 extends through pores 25 of the PTFE liner, and bonds tostent 60, thereby providing prosthesis 10 as an integral compositestructure which can be effectively mechanically anchored within a bodylumen to an intraluminal wall thereof. Such a design overcomes theproblems associated with adhering polytetrafluoroethylene with anadhesive material, as discussed above.

Prosthesis 10 is preferably capable of maintaining a blood-tightatmosphere at the time of implantation. In order to control the porosityof prosthesis 10, a natural or synthetic sealant may be incorporatedinto prosthesis 10, such as a coating or impregnation of tubular body 21of intraluminal liner 20. Such sealants are well known in the art, andare typically applied to a prosthesis during manufacture and then driedor cured on the prosthesis to provide a sealed, blood-tight graft. Forexample, intraluminal liner 20 may be a porous structure as discussedabove, and may be impregnated with collagen or the like to act as asealant for rendering prosthesis 10 blood-tight. Such collagen istypically resorbed by the body over time, and is replaced with nativetissue, which further serves to anchor prosthesis 10 in place within thebody lumen. Moreover, adhesive 40 may include sealing properties and mayitself act as a sealant during implantation, thus rendering prosthesis10 blood-tight.

Prosthesis 10 may further include a removable cover in the form of asleeve positioned over adhesive 40. Such a sleeve is particularly usefulduring delivery of prosthesis 10, in that the sleeve prevents adhesive40 from contacting the luminal surface of the vessel prior to beingpositioned at the area of implantation.

As shown in FIG. 6, prosthesis 10 may further include a lumen conduitliner 70 within intraluminal liner 20 for unobstructed blood flowthrough prosthesis 10. Such lumen conduit liner 70 is particularlypreferred in embodiments incorporating a mechanical support such asstent 60. In such embodiments, stent 60 is preferably positioned betweenintraluminal liner 20 and lumen conduit liner 70. Lumen conduit liner 70may be constructed of any known material in the art, and is preferablyconstructed of the same material as intraluminal liner 20. Inparticularly preferred embodiments, both intraluminal liner 20 and lumenconduit liner 70 are polytetrafluoroethylene. Moreover, adhesive 40preferably extends through pores of intraluminal liner 60, about stent60 and through pores lumen conduit liner 70, thereby creating anintegral structure for implantation.

Having described the structure of the prosthesis of the presentinvention in terms of a preferred embodiment, its preferred use inimplantation will now be discussed. As is well known in percutaneousapplications, a needle is inserted intraluminally into a blood vessel. Aguidewire is then inserted through the blood vessel and advanced to thearea of implantation of prosthesis 10. A delivery catheter for deliveryof prosthesis 10 is then inserted and guided over the guidewire to aposition at the area of implantation. Such a delivery catheter is wellknown in the art, and is preferably in the form of a balloon catheter,with prosthesis 10 including a cover sheath disposed thereover beingpositioned about the balloon during delivery in a reduced diameter.

After positioning at the area of implantation, the cover sheath isremoved from prosthesis 10. The balloon of the delivery catheter is thenexpanded. Such expansion causes prosthesis 10 to expanded from thereduced, delivery diameter, to an expanded, implantation diameter. Uponcontacting of prosthesis 10 with the interior wall surface of the bodylumen, adhesive 40 adheres to the wall surface, thus adhering prosthesis10 to the interior of the body lumen. In embodiments incorporatingnodules 50 containing adhesive 40 therein, expansion of the ballooncauses engagement of prosthesis 10 against the interior wall surface ofthe body lumen, which exerts pressure on nodules 50. Such pressurecauses nodules 50 to rupture along rupture lines 55, thus causingadhesive 40 contained within nodules 50 to be released and contact theinterior wall of the body lumen. As such, prosthesis 10 is adhered tothe body lumen.

Further, adhesive 40 preferably extends through pores 25 of intraluminalliner 20, thereby further anchoring tubular body 21 and stent 60 as anintegral structure within the body lumen. Expansion of the balloon mayexert sufficient pressure to cause additive 40 to flow through pores 25of intraluminal liner 20, thus effecting such anchoring.

In yet a further embodiment of the present invention, adhesive 40 may beapplied to prosthesis 10 in situ after delivery to the site ofimplantation. For example, intraluminal liner 20 (which may includestent 60) may be delivered to the site of implantation. After expansionof intraluminal liner 20 at the site of implantation, adhesive 40 may beapplied to adhere prosthesis 10 to the intraluminal wall of the bodylumen. This is preferably accomplished by delivering adhesive 40 throughthe delivery catheter and applying adhesive 40 to external surface 24 oftubular body 21 of intraluminal liner 20. More preferably, intraluminalliner is a porous structure, and adhesive 40 is applied, for exampleunder pressure, through pores 25 of intraluminal liner 20 from interiorsurface 23 of tubular body 21 to external surface 24 of tubular body 21.Adhesive 40 may then be cured in situ, thereby firmly attachingprosthesis 10 to the intraluminal wall of the body lumen. In such anembodiment, a multi-channel balloon delivery catheter such as thatdisclosed in U.S. Pat. No. 5,254,089 is particularly useful.

Various other modifications to the foregoing disclosed embodiments willnow be apparent to those skilled in the art. Thus, the particularlydescribed preferred embodiments are intended to be illustrative and thepresent invention is not meant to be limited thereto. The true scope ofthe invention is set forth in the following claims.

1. An implantable prosthesis comprising: a biocompatible elongatetubular body having an interior surface and an exterior surface; and abiocompatible adhesive disposed on said interior surface of said body,wherein said prosthesis further comprises a mechanical support, andwherein said mechanical support is bioabsorbable.
 2. An implantableprosthesis comprising: a biocompatible elongate tubular body having aninterior surface and an exterior surface; and a biocompatible adhesivedisposed on said interior surface of said body, wherein said prosthesisfurther comprises a mechanical support, and wherein said mechanicalsupport comprises a porous polymeric band.
 3. An implantable prosthesiscomprising: a biocompatible elongate liner having an interior surfaceand an exterior surface; and a biocompatible adhesive disposed on saidinterior surface of said liner, wherein said prosthesis further includesa concentric tubular body within said liner and a mechanical supportbetween said concentric tubular body and said liner.
 4. An implantableprosthesis comprising: a biocompatible elongate liner having an interiorsurface and an exterior surface and a plurality of pores sufficient topermit ingrowth of body tissue; at least one encapsulated biocompatibleadhesive disposed on said interior surface of said liner; and amechanical support; wherein said adhesive extends through the pores ofsaid liner and is active in an intraluminal environment so as to anchorsaid liner to an intraluminal surface of a body lumen; and wherein saidmechanical support is bioabsorbable.
 5. An implantable prosthesiscomprising: a biocompatible elongate liner having an interior surfaceand an exterior surface and a plurality of pores sufficient to permitingrowth of body tissue; at least one encapsulated biocompatibleadhesive disposed on said interior surface of said liner; and amechanical support; wherein said adhesive extends through the pores ofsaid liner and is active in an intraluminal environment so as to anchorsaid liner to an intraluminal surface of a body lumen; and wherein saidmechanical support comprises a porous polymeric band.
 6. An implantableprosthesis comprising: a biocompatible elongate liner having an interiorsurface and an exterior surface and a plurality of pores sufficient topermit ingrowth of body tissue; and at least one encapsulatedbiocompatible adhesive disposed on said interior surface of said liner;wherein a concentric tubular body is included within said liner; whereina mechanical support is included between said concentric tubular bodyand said liner; and wherein said adhesive extends through the pores ofsaid liner and is active in an intraluminal environment so as to anchorsaid liner to an intraluminal surface of a body lumen.